摘要

Isoflurane has the dual effects on nociceptive stimulation. It produces hyperalgeia at low partial pressure (0.1 MAC), while displays an antinociceptive effect at higher concentrations (0.4 MAC~0.6 MAC). The different actions of isoflurane on Aδ and C fibers of the spinal cord, and the neuronal nicotinic acetylchlorine receptors (nAChRs), adrenoceptors (including α1 and α2 receptors), excitatory neuronal synaptic transmission ( NMDAergic and AMPAergic), and inhibitory neuronal synaptic transmission ( GABAergic and glycinergic), substance P, and c-fos gene in the central never system may contribute to the mechanisms of isoflurane’s dual effects.

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